It is given that sinA=178​ and cosB=−1312​ where A is an acute angle and B is an obtuse angle. Without using calculator,

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It is given that sinA=178​ and cosB=−1312​ where A is an acute angle and B is an obtuse angle. Without using calculator,

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It Is Given That Sina 178 And Cosb 1312 Where A Is An Acute Angle And B Is An Obtuse Angle Without Using Calculator 1
It Is Given That Sina 178 And Cosb 1312 Where A Is An Acute Angle And B Is An Obtuse Angle Without Using Calculator 1 (36.96 KiB) Viewed 34 times
It is given that sinA=178​ and cosB=−1312​ where A is an acute angle and B is an obtuse angle. Without using calculator, find the values of (a) csc2A (b) cos2B (c) tan(A−B) (10 marks) QUESTION 2 Prove that (a) 3+cos2A1−cos2A​=1+cos2Asin2A​ (b) 1+cosθ1−cosθ​=tan22θ​ (10 marks) QUESTION 3 Solve the following trigonometric equations for 0≤x≤360,csc2x+cotx−7=0 (10 marks)
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